Structure of Social Networks in a Passerine Bird: Consequences for Sexual Selection and the Evolution of Mating Strategies
Structure of Social Networks in a Passerine Bird: Consequences for Sexual Selection and the Evolution of Mating Strategies
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DOI：
10.1086/655216
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发表时间：
2010-09-01
影响因子：
2.9
通讯作者：
Badyaev, Alexander V.
中科院分区：
文献类型：
--
作者：
Oh, Kevin P.;Badyaev, Alexander V.
社会环境是适应性的关键决定因素，在许多分类群中，是由个体在社会环境中的行为歧视形成的，这表明动物可以积极影响它们所经历的选择。在吸引雌性的竞争中，雄性可能会通过选择相对于竞争对手更具吸引力的社会环境来改变性选择。在整个种群中，这种行为应该通过改变雄性交配成功和性装饰制作之间的关系来影响性选择模式。在这里，我们使用网络分析，以探讨男性的社会行为模式的关系，羽毛的吸引力和交配成功的自由生活人口的家雀。在非繁殖季节，不太精致的男性更频繁地改变协会与不同的社会群体相比，更精致的男性，表现出更大的忠诚，以一个单一的社会群体。由发病对形成，社会不稳定的男性有效地增加了他们的吸引力相对于其他男性在同一羊群。因此，经常在社会群体之间移动的男性比具有相同性取向的较少社会个体具有更大的配对成功率。我们讨论了这些结果与条件交配策略和社会行为的作用，在进化过程中的性选择。
The social environment is a critical determinant of fitness and, in many taxa, is shaped by an individual's behavioral discrimination among social contexts, suggesting that animals can actively influence the selection they experience. In competition to attract females, males may modify sexual selection by choosing social environments in which they are more attractive relative to rivals. Across the population, such behaviors should influence sexual selection patterns by altering the relationship between male mating success and sexual ornament elaboration. Here we use network analysis to examine patterns of male social behavior in relation to plumage ornamentation and mating success in a free-living population of house finches. During the nonbreeding season, less elaborate males changed associations with distinct social groups more frequently, compared to more elaborate males that showed greater fidelity to a single social group. By the onset of pair formation, socially labile males effectively increased their attractiveness relative to other males in the same flocks. Consequently, males that frequently moved between social groups had greater pairing success than less social individuals with equivalent sexual ornamentation. We discuss these results in relation to conditional mating tactics and the role of social behavior in evolutionary change by sexual selection.